Debian: Security Advisory (DLA-2972-1)

# SPDX-FileCopyrightText: 2022 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.892972");
  script_cve_id("CVE-2016-9318", "CVE-2017-16932", "CVE-2017-5130", "CVE-2017-5969", "CVE-2022-23308");
  script_tag(name:"creation_date", value:"2022-04-09 01:00:10 +0000 (Sat, 09 Apr 2022)");
  script_version("2024-02-02T05:06:08+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:08 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-02-26 19:48:14 +0000 (Mon, 26 Feb 2018)");

  script_name("Debian: Security Advisory (DLA-2972-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB9");

  script_xref(name:"Advisory-ID", value:"DLA-2972-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2022/DLA-2972-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/libxml2");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'libxml2' package(s) announced via the DLA-2972-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Five security issues have been discovered in libxml2: XML C parser and toolkit.

CVE-2016-9318

Vulnerable versions do not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.

CVE-2017-5130

Integer overflow in memory debug code, allowed a remote attacker to potentially exploit heap corruption via a crafted XML file.

CVE-2017-5969

Parser in a recover mode allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted XML document.

CVE-2017-16932

When expanding a parameter entity in a DTD, infinite recursion could lead to an infinite loop or memory exhaustion.

CVE-2022-23308

the application that validates XML using xmlTextReaderRead() with XML_PARSE_DTDATTR and XML_PARSE_DTDVALID enabled becomes vulnerable to this use-after-free bug. This issue can result in denial of service.

For Debian 9 stretch, these problems have been fixed in version 2.9.4+dfsg1-2.2+deb9u6.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to its security tracker page at: [link moved to references]

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]");

  script_tag(name:"affected", value:"'libxml2' package(s) on Debian 9.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "DEB9") {

  if(!isnull(res = isdpkgvuln(pkg:"libxml2", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-dev", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-doc", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-utils", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-utils-dbg", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python-libxml2", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python-libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2-dbg", ver:"2.9.4+dfsg1-2.2+deb9u6", rls:"DEB9"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);